Carl schaeffer and gustav oehlmann



UNITED STATES PATENT FHCE.

CARL SCHAEFFER AND GUSTAV OEHLMANN, OF BERLIN, GERMANY.

LUBRICATOR.

SPECIFICATION forming part of Letters Patent No. 395,179, dated December 25, 1888. Application filedApril 25, 1888. Serial No. 271,809. (No model.) Patented in Belgium March 15, 1888, No, 80,830; in England April 12,1888, No. 5,437; in France May 16, 1888, No, 189,397,

and in Austria-Hungary June 21, 1888, No. 9,008 and No.

To all whom it may concern:

Be it known that we, CARL SCHAEFFER and GUSTAV OEHLMANN, both subjects of the King of Prussia, and residents of the city of Berlin, in the Empire of Germany, have in vented certain new and useful Improvements in Lubricators, (for which Letters Patent were heretofore granted to us by the governments of France, dated Bilay 16, 1888, No. 189,397; Belgium, dated March 15, 1888, No. 80,830; Austria-Huugary, dated June 21,1888, No. 9,008 and No. 24,809, and Great Britain, dated April 12, 1888, No. 5,437,) of which the following is a specification.

The object of our invention is to provide a new and improved lubricating-cup for oils that How easily, and by means of which cup the oil is delivered to the parts to be lubricated in certain equal quantities-for example, drops at regular intervalsand which cup also permits of delivering a greater quantity of oil at will in case the parts to be lubricated become heated.

The invention consists in the combination, with ai1 oil-cup,oi' a valve-rod held longitudinally in the same, a valve at the lower end of said rod, a spring pre. ing said rod upward and the valve toward its seat, and a screw in the cover of the cup, which screw can press the valve-rod and valve downward.

The invention also consists in the construction and combination of parts and details, as will be fully described and set forth hereinafter, and then pointed out in the claims.

In the accompanying drawings, Figure 1 is a vertical transverse sectional view of our improved lubricating-cup, the oiloutlet being closed. Fig. 2 is a side view of the same, the oil-outlet being open. liig. 3 is a vertical transverse section of the same, the oil-outlet being open to deliver a large quantity of oil. Fig. 4.- is a side view of the same, parts being broken out and others in section, and the oiloutlet being closed, as it is when the machinery is not in operation.

Similar letters of reference indicate correspending parts.

The glass cup A is provided at its bottom with the neck a, that rests and is secured in an annular recess in. the top of the screwsockct I having the screw-neck b, which is to be screwed into the oil-hole of the bearing to be lubricated. A packing-ring, e, is interposed between the end of the neck a and the bottom of the annular recess in the socket 1-3. The socket B is provided with a longitudinal bore, the lower end of which is beveled to form a seat, 0, for the beveled upper end, (I, of the paraboloidal valve-head d on the lower end of the valve-rod 1). Said rod '1) is triangular in cross section from its bottom to slightly above half its height, and itsnipper part is made cylindrical, a shoulder, D, bein formed at the upper end of that part that is triangular in cross-section. Said cylindrical part passes longitudinally through an upright sleeve, E, having a series of side apertures, E and having its lower end tightly screwed in the socket B. The upper end of said sleeve E is threaded externally, and on said thread the intcrually-threaded neck f on the under side of the cover E of the cup A is screwed, said neck having a series of large openings, f.

A packing-ring, c, is interposed between the top of the cup A and the under side of the cover E. The sleeve E has a centrally-apertured transverse partition, g, through which the cylindrical part of the rod D passes freely.

The upper end of the triangular part of the rod can abut against said partition g, thus limiting the upward niovenient of said rod.

The lower end of a spiral spring, G, surrounding the cylindrical part of the rod D, rests on the partition g, and the upper end of said spring rests against a collar, 7', screwed on the upper end of the rod D, and by means of which collar the tension of the spring G can be regulated. The upper end of the rod D projects into a cavity in the under side of the cover F.

A screw, 11, is screwed into the threaded central bore of the cover, said bore being the filling-opening for the cup. A tubular adj usting-screw, I, having a suitable head, is screwed through the threaded central bore of the screw II, and is provided with a lock-nut, t. A rod, 7e, projecting from the upper end of the rod D, fits closely in the bore of the tubular screw I and closes the same, but nevertheless can be moved longitudinally in said bore. The cup is thus closed, and can be used for fixed or rotative bearings or parts. After the above-described cup has been secured on the bearing, the lock-nuti is loosened and the screw I is screwed down and presses the rod D, on the upper end of which it acts, downward, whereby the spring Gr is compressed. Thereby the upper beveled end of the valve (Z is moved a short distance from its seat 0. The oil passes through the holes in the sleeve E into said sleeve, flows down that part of the rod D that is triangular in cross-section, and flows out at the bottom of the bore of the socket B and down on the surface of the valve. It collects at the bottom point of said valve and forms a drop, which drops upon the part to be lubricated. According to the size of the opening between the beveled top of the valve d and the seat 0, a greater or less quantity of oil flows out of the cup and the drops form at correspondinglyless or greater intervals. As the drops of a liquid of the same kind are always of the same size, and the distance between the beveled top of the valve cl and the seat 0 can be adjusted most minutely, the number of drops that are to form.in a given time can be regulated very nicely, and thus a perfect lubrication takes place with a minimum quantity of oil. If the hearing has nevertheless become heated, it is only necessary to force down the rod 7, which in turn forces down the rod D and opens the valve farther, permitting a greater quantity of oil to flow upon the bearing. This does not in any wayinterfere with the ad justment of the valve by means of the nut As long as the rod is is pressed down the valve remains open, and the greater quantity of oil can flow upon the bearing, and prevents burning. As soon as the rod 7; is released the spring G raises the rod D until the valve is opened only the distance for which it was originally adjusted.

To fill the cup A, the screw H is removed and the oil is poured through the opening in the cover F. The apertures f in the neck f prevent the formation of air-bubbles and permit the oil to flow down into the cup "ery readily.

In case the machine is not in operation the flow of oil can be stopped very easilyby screwing up the screw II. Thereby the screw J is moved from the upper end of the rod D, permitting the spring G to raise said rod and close the valve. (See Fig. 4.) Thereby the adjustment of the valve is not changed, for when the screw II is screwed down before starting the machine the screw I is moved down with it, and, pressing on the upper end of the rod D, presses the same down sufficiently to open the valve (1 the required distance.

Having thus described our invention, we claim as new and desire to secure by Letters Patent- 1. In a lubricator, the combination, with an oil-cup provided at its lower end with a valveseat, of a rod passing longitudinally through the cup and having a valve on its lower end, a spring pressing said rod upward and the valve toward its seat, and a tubular adjusting-screw in the cover of the cup, which screw can act on the upper part of the said rod, substantially as herein shown and described.

2. In a lubricator, the combination,with an oil-cup provided at its lower end with a valve seat, of a rod held longitudinally in the cup and provided at its lower end with a valve, a spring pressing the rod upward and the valve toward its seat, and a tubular adj listing-screw in the cover of the cup, which screw can act on the upper part of the rod, said rod having a reduced portion passed through the tubular screw and projectiu from the top of the same, substantially as herein shown and described.

3. In a lubricator, the combinati0n,with an oil-cup having a valve-seat on its lower end, of a cover on the cup, a tubular screw in said cover, another screw in said tubular screw, a rod held longitudinally in the cup and provided at its lower end with a valve, the upper end of the said rod' projecting into said tubular .screw, and a spring for pressing the valverod upward and the valve toward the seat, substantially as herein shown and described.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

CARL SCHAEFFER. GUSTAV OEI-ILMANN. Vitnesses:

HORATIO R. BIeELow, ALEX. SCHULZE. 

